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Perbandingan koef = perb mol
2 Al + 3 H₂SO₄ ⇒ Al₂(SO₄)₃ + 3 H₂
0,1 0,15 0,05 0,15
Mr Al₂(SO₄)₃ = 342,15
massa H₂SO₄ = mol x Mr = 0,05 x 342,15 = 17,1075 gram
Volume gas H₂ (STP)
V = mol x 22,4
= 0,15 x 22,4 = 3,36 Liter